Bunk BU 12000 – specifications
Built: 1983 · Series: BU
Data for the version built 1983 · Data origin: Official register · sources
More machines from model year 1983
Not the right version? The data comes from vehicle registers holding many near-identical versions side by side. Photograph the data plate — we read make and type from it. Open the scanner e-mail address required
Bunk BU: the low-loader trailer line for construction machinery, type designation by gross weight from BU 3,500 to BU 20,000, 940 to 5,980 kg kerb weight, 3,500 to 28,000 kg gross weight
The BU line is a type range from the German manufacturer Bunk, which builds low-loader trailers for hauling construction machinery and working equipment. The type designation follows a clear logic: the code BU is followed by a three- to five-digit number giving the gross weight in kilograms, from BU 1000 through BU 3500 and BU 10000 up to BU 20000 and BU 28000, supplemented by additions such as ZW for twin tyres or T for certain frame variants.
Read on 3 more paragraphs
The register lists 48 versions here with a kerb weight of 940 to 5,980 kg and a gross weight of 3,500 to 28,000 kg. Widths range from 1,890 to 2,600 mm, lengths from 5,860 to 12,820 mm.
With a gross weight of up to 28 tonnes, the BU line runs from light O3-class trailers to heavy O4-class low-loaders, of the kind needed to move excavators, wheel loaders and other construction machinery between sites. Such low-loaders are common among construction firms, plant-hire companies and in earthworks.
When buying a used low-loader trailer, check the load platform for distortion and cracks caused by point loads from wheels, and check the ramps, locks and lashing eyes for correct function. Axles, the braking system and the frame should be checked especially carefully for rust and wear given the high loads carried; parts for axles and braking systems are available from commercial-vehicle and trailer dealers.
Sources: SpecCodex register, model data: Bunk BU
Technical data
Dimensions and weights
| Width | 2,480 mmcorrect |
|---|---|
| Coupling-to-axle distance | 4,450 mmcorrect |
| Unladen weight | 3,225 kgcorrect |
| Gross vehicle weight | 12,000 kgcorrect |
Drivetrain and chassis
| Top speed | 100 km/hcorrect |
|---|
Frequently asked questions
How much does the Bunk BU 12000 weigh?
The unladen weight is 3,225 kg.
What is the gross vehicle weight of the Bunk BU 12000?
12,000 kg.
Up to what speed is the Bunk BU 12000 approved?
Approved up to 100 km/h.
When was the Bunk BU 12000 built?
Production years: 1983.
What to check before buying
- Search the frame and welds at the axle mounts — that is where cracks start.
- Check the brakes and the last inspection in the papers.
- Work the gross weight against the towing vehicle before buying.
- Compare the chassis number with the papers.
- Look at the floor, cover or body from the inside — rust does not show from outside.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 7 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
The technical data on this page comes from official vehicle registration records (RDW/Traficom), not from the manufacturer.
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Other models in this series
BU 1000
BU 10000
BU 10000 C
BU 11000
BU 15000 0
BU 15000.O
BU 20000
BU 20000 S.D.O.
BU 28.000 CC
BU 3500
BU 3500 T
BU 3500 ZW
Sources: RDW — Dutch national vehicle register (retrieved August 2026) · Data sources and cross-checks
Trailer in 3D section
Turn the model, look inside and click an assembly — each one is explained.
